Bed frame



FIG. 1 is a front perspective view of a bed frame showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a right side elevation view thereof; the left side elevation view being a mirror image thereof; and,

FIG. 4 is a top plan view thereof.

The dashed broken lines illustrating portions of the bed frame are for environmental purposes only and form no part of the claimed design. Views of the bed frame that are not shown in the figures form no part of the claimed design. 

CLAIM The ornamental design for a bed frame, as shown and described. 